Microprocessor concept and architecture—Ted Hoff was the first to
recognize that Intel's new silicon-gated MOS technology might make a
single-chip CPU possible if a sufficiently simple architecture could be
developed. He developed such an architecture with just over 2000
transistors. In 1969, Japanese calculator manufacturer, Busicom, accepted
Hoff's (Intel's) proposal for alternate architecture in which a
single-chip general-purpose computer central processor (CPU) would be
programmed to perform most calculator functions. Further refinements in
architecture and logic design by Faggin and Mazor led to development of
first working CPU in February 1971, which had as much computing power as
the room-filling ENIAC (1946), and the introduction of the Intel 4004
microprocessor in November 1971. (1996)